Question: When is {instance of} of {platinum} which is {followed by} is {gold} ?
Paraphrase: When is {occurrence of} of {platinum} which is {taken after by} is {gold} ?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q880 p:P31 ?s . ?s ps:P31 ?obj . ?s pq:P156 wd:Q897 }